A novel application of nylon membranes for tributyltin determination in complex environmental samples by fluorescence spectroscopy and multivariate calibration

Manuel A. Bravo, Graciela M. Escandar, Alejandro C. Olivieri, Emmanuelle Bardin, Luis F. Aguilar, Waldo Quiroz

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

The widely distributed pollutant tributyltin (TBT) was analyzed in different environmental samples (waters and sediments) combining preconcentration on a nylon membrane, excitation-emission fluorescence matrices directly measured over the membrane and second-order multivariate calibration. The latter was implemented using unfolded partial least-squares with residual bilinearization (U-PLS/RBL), a flexible algorithm achieving second-order advantage, even under severe spectral overlapping among sample components. Matrix-specific calibrations were required to overcome matrix effects, resulting in good analytical performance. TBT was determined in the concentration ranges 0.043-1.42ng Sn mL-1 in water and 24-400μg Sn kg-1 in sediments, with adequate detection limits in the range 0.03-0.15ng Sn mL-1.

Original languageEnglish
Pages (from-to)77-84
Number of pages8
JournalChemometrics and Intelligent Laboratory Systems
Volume148
DOIs
StatePublished - 15 Nov 2015
Externally publishedYes

Keywords

  • Fluorescence spectroscopy
  • Multivariate calibration
  • Nylon membrane
  • Tributyltin

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